Outer PE Inner EP Plastic-Coated Composite Steel Pipe
Our outer PE inner EP plastic-coated composite steel pipes are professionally manufactured and available in a wide range of sizes. These coated steel pipes can be customized in terms of lining thickness, allowing for flexibility based on the corrosive environment they will be exposed to. The pipe length can extend up to 6-12 meters, making them ideal for large-scale infrastructure projects. The nominal diameter typically ranges from 0.5mm to 1mm, ensuring smooth internal surfaces that reduce friction and wear, leading to lower fluid loss and higher flow efficiency. This makes them energy-efficient and highly practical for various applications.
In recent years, anti-corrosion spiral steel pipes have become widely used in water supply and drainage systems, potable water distribution, and fire protection pipelines. Traditionally, hot-dip galvanized steel pipes were commonly used for fire systems, but now many residential communities, hotels, and office buildings are transitioning to epoxy powder-coated steel pipes. These pipes offer an attractive appearance, long-lasting durability, and are considered key products in modern industries due to their excellent performance and safety features.
The outer PE and inner EP plastic-coated steel pipes are designed with advanced technology. The powder coating includes flame retardants and modified epoxy resin, which enhances temperature resistance. These coatings do not burn or soften during long-term use, ensuring safe and reliable performance in critical applications.
One of the main advantages of epoxy powder-coated steel pipes is their tough, water-resistant film, which is non-toxic and offers strong adhesion. The paint film has excellent rust and moisture resistance, thanks to high-quality raw materials. Additionally, it provides superior mechanical strength, including abrasion and impact resistance. With a high solid content and thick coating, these pipes are highly durable and long-lasting.
The molecular structure of epoxy powder coatings contains active epoxy groups, which allow them to cross-link with various curing agents. This results in a three-dimensional network structure that is insoluble and infusible, enhancing the overall performance of the coating. Epoxy powder coatings are among the earliest types of thermosetting powders and are widely used in electrostatic spraying for decorative and protective purposes. They are also popular for their chemical resistance, especially in anti-corrosion applications.
Thermoplastic powder coatings, such as polyethylene, polyvinyl chloride, and polypropylene, are also used in certain applications. However, thermosetting plastics like epoxy and phenolic resins are preferred for their better leveling and wetting properties, resulting in a smoother and more uniform coating on steel pipes. The typical wall thickness of the coating ranges from 100 to 500 microns, usually around 350 microns, ensuring optimal protection and performance.
Key features of these pipes include being hygienic, non-toxic, and resistant to microbial growth, which helps maintain clean fluid quality. They also exhibit excellent weather resistance, making them suitable for harsh environments such as deserts and saline-alkali regions. During installation, proper attention should be given to threading and cooling, while flange connections require precise on-site measurements and processing drawings. For non-coated pipes, it is recommended to first assemble and weld the fittings before applying the coating and lining, then transport them to the site for final installation.
When using grooved plastic-coated pipe fittings, it's essential to roll the grooves using a groove machine, ensuring the depth meets industry standards. Prioritizing finished grooved fittings can streamline the installation process and improve overall system integrity.
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